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dma-mapping: make the global coherent pool conditional

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Only build the code to support the global coherent pool if support for
it is enabled.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Dillon Min <dillon.minfei@gmail.com>
This commit is contained in:
Christoph Hellwig
2021-06-24 19:37:00 +02:00
parent 39a2d3506b
commit 22f9feb499
2 changed files with 37 additions and 30 deletions
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18
include/linux/dma-map-ops.h
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@@ -171,13 +171,6 @@ int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr);
int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, size_t size, int *ret);
void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
dma_addr_t *dma_handle);
int dma_release_from_global_coherent(int order, void *vaddr);
int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
size_t size, int *ret);
int dma_init_global_coherent(phys_addr_t phys_addr, size_t size);
#else
static inline int dma_declare_coherent_memory(struct device *dev,
phys_addr_t phys_addr, dma_addr_t device_addr, size_t size)
@@ -187,7 +180,16 @@ static inline int dma_declare_coherent_memory(struct device *dev,
#define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)
#define dma_release_from_dev_coherent(dev, order, vaddr) (0)
#define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
#endif /* CONFIG_DMA_DECLARE_COHERENT */
#ifdef CONFIG_DMA_GLOBAL_POOL
void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
dma_addr_t *dma_handle);
int dma_release_from_global_coherent(int order, void *vaddr);
int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
size_t size, int *ret);
int dma_init_global_coherent(phys_addr_t phys_addr, size_t size);
#else
static inline void *dma_alloc_from_global_coherent(struct device *dev,
ssize_t size, dma_addr_t *dma_handle)
{
@@ -202,7 +204,7 @@ static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma,
{
return 0;
}
#endif /* CONFIG_DMA_DECLARE_COHERENT */
#endif /* CONFIG_DMA_GLOBAL_POOL */
/*
* This is the actual return value from the ->alloc_noncontiguous method.